Реакция #5544

Уравнение реакции

5-[2-(amino)ethylthio]imidazo[1,2-a]pyridine

triethylamine

methyl chloroformate

→

desired product

Выход 66.9%

5-[2-(methoxycarbonylamino)ethylthio]imidazo[1,2-a]pyridine

Выход 66.9%

Растворители

methylene chloride

Условия реакции

Обработка

1. 1
   Температураcooling
2. 2
   workup.STIRRINGthe mixture was stirred at room temperature for 20 minutes
3. 3
   ПромывкаThe reaction mixture was washed in turn with an aqueous sodium bicarborate solution and water
4. 4
   Сушкаdried over anhydrous magnesium sulfate
5. 5
   workup.DISTILLATIONthe solvent was distilled off
6. 6
   ДругоеThe residue was purified by column chromatography (eluent: ethanol/ethyl acetate=1:10)

Методика

To a solution of 5-[2-(amino)ethylthio]imidazo[1,2-a]pyridine (1.93 g, 10 mmoles) and triethylamine (1.53 ml, 11 mmoles) in methylene chloride (30 ml) was added methyl chloroformate (0.77 ml, 10 mmoles) under ice-cooling with stirring and the mixture was stirred at room temperature for 20 minutes. The reaction mixture was washed in turn with an aqueous sodium bicarborate solution and water, dried over anhydrous magnesium sulfate, and then the solvent was distilled off. The residue was purified by column chromatography (eluent: ethanol/ethyl acetate=1:10) to obtain 1.68 g of the desired product (66.9%, colorless crystals).

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